Bacharach FM3700 Operating Manual

WARNING: INHALATION OF HIGH CONCENTRATIONS OF REFRIGERANT VAPORS IS HARMFUL

AND MAY CAUSE HEART IRREGULARITIES, UNCONSCIOUSNESS, OR DEATH.
INHALATION OF REFRIGERANTS IS EXTREMELY DANGEROUS AND DEATH CAN OCCUR

WITHOUT WARNING.

HEAVIER THAN AIR.

CAUSE FROSTBITE.
UNDER PRESSURE.

CAUTION: BEFORE OPERATING THIS UNIT, PLEASE READ THIS MANUAL IN ITS ENTIRETY. IT IS

IMPORTANT THAT YOU HAVE A THOROUGH UNDERSTANDING OF THE PROCEDURES OUTLINED IN THIS

MANUAL. FAILURE TO FOLLOW THESE PROCEDURES COULD VOID ALL MANUFACTURER WARRANTIES.

Model 3700

Part No. 2000-3700

Instruction 2079-0110

Operation & Maintenance

Rev. 3 – March 2013

DELIBERATE

VAPORS REDUCE OXYGEN AVAILABLE FOR BREATHING AND ARE

DECOMPOSITION PRODUCTS ARE HAZARDOUS. LIQUID CONTACT MAY

ALL REFRIGERANT CONTAINERS, EQUIPMENT, AND HOSES ARE

BEFORE HANDLING REFRIGERANTS, READ MATERIAL SAFETY DATA SHEET

FROM REFRIGERANT MANUFACTURER.

Model 3700 Portable Commercial Oilless Recovery

Refrigerants

R12, R-22, R-134a, R-500, R-502, HP/MP Blends

Power Source

115V AC 50/60 Hz

Amperes

RLA 10.2A LRA 65 A

Compressor

1 HP High Performance Oilless

Dimensions

Height 12.0"

Width 14.0"

Depth 8.5"

Weight 42 Lbs.

Refrigerant Recovery Rates

Certified per AhRI 740-95 & 740-98

8.31 lb/min

3.77 kg/min

50.51 lb/min

22.91 kg/min

0.75 lb/min

0.34 kg/min

6.11 lb/min

2.77 kg/min

41.71 lb/min

18.92 kg/min

0.57 lb/min

0.26 kg/min

9.37 lb/min

4.25 kg/min

53.00 lb/min

24.04 kg/min

0.84 lb/min

0.38 kg/min

SPECIFICATIONS

Refrigerant Liquid Rate Liquid Push-Pull Rate Vapor Rate

R-22

R-134A

R-410A

TABLE OF CONTENTS

Specifications & Features ............................................................................................... 2

Introduction ....................................................................................................................... 3

General Safety Instructions ............................................................................................ 4

Operational Safety ........................................................................................................ 5

Description of Features ................................................................................................... 6-7

Vapor Recovery Procedures ........................................................................................... 8

Vapor Recovery Hose Connections (Figures 1&2)....................................................... 9

Liquid Recovery General Information. ........................................................................... 10

Liquid Recovery Procedures ................................................................................. 11

Liquid Push-Pull Hose Connections (Figures 3&4) ...................................................... 12

Pump Down Operations .................................................................................................. 13

DOT Recover Cylinder Safety ........................................................................................ 14

Troubleshooting Guide .................................................................................................... 15

Electrical Schematic ........................................................................................................ 16

Replacement and Accessory Parts List ......................................................................... 17

2

INTRODUCTION

FEATURES

Congratulations on your purchase of the Bacharach Model 3700 high performance
oilless recovery system. Bacharach Test Systems has endeavored to make the Model
3700 the highest performing, most portable and easiest to use recovery system on the
market. We are committed to your complete satisfaction!

Please note that Bacharach Test Systems requires that a filter be used on the inlet hose
coming from the system being serviced in order to protect the compressor from
particulate. A standard filter or filter dryer is suggested. The compressor warranty will be
voided if it is determined that a filter was not used during the operation of this
equipment.

CAUTION: These instructions are for personnel trained and experienced in the
handling of refrigerants. Unqualified individuals should not attempt to
operate this equipment. Failure to follow proper operating procedures may
cause personal injury.

• A high performance dual headed oilless recovery system.

• New oilless compressor technology that is QUIETER, FASTER, AND LIGHTER than

current products on the market.

• Tolerates liquid during vapor recovery operations with no compressor damage.

• Very easy to operate.

• Extra large condensing ensures high recovery rates even on the hottest days.

• Self-purging valve completely purges the condenser and tubing, eliminating cross

contamination when switching between refrigerants.

• Solid state LED status display keeps the operator informed of the operational status
of the unit. The following situations are monitored: High Pressure Shutoff, Recovery
Cylinder Full Shutoff (if option is installed), Automatic Vacuum Shutoff, and System
Operating.

• Suction and discharge gauges eliminate the need for a manifold gauge set.

• Inlet and outlet ball valves provide full refrigerant flow and positive shutoff.

• Automatic vacuum shutoff at 13” HG vacuum.

• Automatic high-pressure shutoff at 550 psi.

• Rugged heavy-duty steel construction with epoxy powder coating finish.

• Options include:

Automatic 80% Tank Full Shutoff Option Part # 0002-0081

Specifications are subject to change without notice.

3

GENERAL SAFETY
I

NSTRUCTIONS

1. KNOW YOUR EQUIPMENT

Read and understand the instruction manual and labels affixed to the unit. Learn its

application and limitations as well as the specific potential hazards of your equipment.

2. G

ROUND ALL EQUIPMENT

This unit is equipped with an approved three pronged grounded power cord and plug. The

green wire is the ground wire and should never be connected to a live terminal.

SE THE PROPER EXTENSION CORD

3. U

Use the following guide for choosing the proper extension cord:

18 gauge cord - maximum length 10 feet
16 gauge cord - maximum length 25 feet
14 gauge cord - maximum length 50 feet
12 gauge cord - maximum length 100 feet

VOID DANGEROUS ENVIRONMENTS

4. A

Do not use this unit in damp or wet locations or expose it to rain. Secure unit when

working above floor level. This equipment should be used in a location with
mechanical ventilation that provides at least four air changes per hour or the
equipment should be located at least 18 inches above the floor. This equipment
should not be used in the vicinity of spilled or open containers of flammable materials.

ISCONNECT UNIT BEFORE SERVICING

5. D

Electrical shock hazard may be present when the unit is disassembled.

VOID ACCIDENTAL STARTING

6. A

Make sure the system switch is in the OFF position before connecting electrical

devices.

EP AIR DAMAGE D PARTS

7. R

Do not operate the unit with a defective part. Repair unit to proper operating

conditions.

8. U

SE RECOMMENDED ACCESSORIES

Follow the instructions that accompany all accessories. Improper use of accessories may

damage the equipment or create a hazard.

SE CAU TI ON WHEN CONNECTING OR DISCONNECTING HOSES

9. U

Improper usage may result in refrigerant burns (frostbite). If a significant refrigerant leak

occurs, proceed immediately to a well ventilated area.

4

OPERATIONAL
S

AFETY

WARNING: Inhalation of high concentrations of refrigerant vapors is harmful
and may cause heart irregularities, unconsciousness, or death. Deliberate inhalation
of refrigerants is extremely dangerous and death may occur without warning. Vapor
reduces oxygen available for breathing and is heavier than air. Decomposition
products are hazardous. Liquid contact can cause frostbite. All refrigerant
containers, equipment and hoses are under high pressure.

• Avoid breathing high concentrations of vapors.

• Use with sufficient ventilation to keep operator exposure below

recommended limits, especially in enclosed and low lying areas.

• Avoid contact of liquid with eyes and prolonged skin exposure.

• Wear safety goggles and protective gloves.

°

• Do not apply open flame or heat unit above 125

• Do not allow refrigerants to contact open flame. Decomposition will occur.

F.

FIRST AID: If high concentrations of refrigerant vapors are inhaled, immediately remove
person(s) to fresh air. Keep calm. If not breathing, give artificial respiration. If breathing is
difficult, give oxygen. Call a doctor. Do not give epinephrine or similar drugs.

EYE: In case of liquid contact, immediately flush eye with water.

Seek medical attention.

SKIN: Flush with water. Treat for frostbite by gently warming the affected area.

CAUTION: All refrigerant hoses, recovery cylinders, refrigerant lines, the unit, and
other vessels containing refrigerants should be handled at all times as if under high
pressure.

COMBUSTIBLE/FLAMMABLE GAS WARNING:

device to recover refrigerants which are rated as combustible/flammable gases
(e.g. ASHRAE - A2 or A3 rated refrigerants).

HAZARDOUS AREA WARNING: This instrument has not been designed to be
intrinsically safe for use in areas classified as hazardous locations. DO NOT use it
in hazardous (classified) locations.

WARNING: Before starting the 3700 recovery unit, you MUST OPEN the outlet port
on the unit and open the port to the recovery tank. Read the entire operating
instruction manual before use. Failure to open the outlet port will cause permanent
damage to the unit and void the warranty.

For your safety, DO NOT use this

5

1. Purge Ball Valve

2. Inlet Port Ball Valve

Opens or closes the inlet port. It is pointing UP (open) for all recovery

4 System Switch

compressor on.

5. Outlet Port Ball Valve

Opens or closes the outlet port. It points DOWN when it is open and to the

6 Inlet Port

Refrigerant hose connection for incoming refrigerant vapors.

8. Outlet Pressure Gauge

Displays the outlet/discharge pressure.

9. Inlet Pressure Gauge

Displays the inlet/suction pressure of the system being evacuated.

Automatic 80% Tank Full

This optional accessory connects to the recovery cylinder overfill sensor and

Protects against high amperage. Located on the left side of the machine.

LOCATION AND
D

ESCRIPTION OF
NIT FEATURES

U

This valve determines what function the Model 3700 performs. This valve
points UP during recovery operations and DOWN for purging and liquid push­pull operations.

operations and points DOWN for purging operations.

3 LED Status Display Displays the status of the machine.

When in the ON position, this switch starts the recovery operation by turning the

LEFT when closed.

7 Outlet Port Refrigerant hose connection for outgoing refrigerant.

Shutoff Cord - Optional
Accessory (Not shown)

automatically shuts the unit off when the recovery cylinder reaches the 80%
liquid fill limit. NOTE: If the Model 3700 is equipped with the
Automatic 80% Tank Shutoff Option, it will not work unless connected to a DOT

recovery cylinder with a compatible level float switch. If the recovery cylinder
does not have a float switch, a shorting cap must be installed in order to
operate the system.

6

Compressor Circuit Breaker
(not shown)